TransGo A/T Servo Piston - 72P

From the factory, 700R4 and 4L60E transmissions were equipped with 4 different servo sizes based on application. The Corvette type piston was primarily found in the tuned, port-injected Corvette as well as the high performance Camaro and Firebird. This TransGo servo piston has the largest second apply surface area of all the original equipment servos. Consequently, this servo provides a shorter, firmer 1-2 shift and with an increased apply area, provides the 2-4 band greater torque capacity in second gear only. Furthermore, the differential area between the band apply area and the release side of the servo piston alters the 3-4 clutch accumulation rate making the 2-3 shift firmer.